Deteriorating air quality is a problem in most Asian cities, and its improvement in Hong Kong was identified as a priority issue in the recent policy address by the Chief Executive, Mr. Tung Chee-Hwa. The dominant cause of air pollution in downtown streets is vehicular emissions, particularly from diesel-fuelled buses, taxis and trucks. It is proposed in this paper that such traffic be greatly reduced in specific urban areas by policy actions, such a terminating bus routes at peripheral interchanges and creating pedestrian malls, and by providing both incentives, namely improved electric public transportation infrastructure, and disincentives, including time-sensitive road pricing for vehicles. Technologies for electric transport are briefly reviewed, and it is concluded that an elevated unidirectional loop system, integrated into the urban fabric, could be operationally effective as a means of decreasing air pollution in Hong Kong.